(19)

(11)

EP 2 664 099 A2

(12)

(88) Date of publication A3: 04.10.2012 (43) Date of publication: 20.11.2013 Bulletin 2013/47 (21) Application number: 12734483.6 (22) Date of filing: 03.01.2012

(51) International Patent Classification (IPC):  H04L 9/32(2006.01) (86) International application number: PCT/IB2012/000061 (87) International publication number: WO 2012/095741 (19.07.2012 Gazette 2012/29)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 12.01.2011 CN 201110005208 (71) Applicant: Alcatel Lucent 75007 Paris (FR)	(72) Inventor: YAO, Yifeng Shanghai 201206 (CN) (74) Representative: Zinsinger, Norbert  Louis Pöhlau Lohrentz P.O. Box 30 55 90014 Nürnberg 90014 Nürnberg (DE)